Contents: Petrol models ↡ Diesel models ↡
Petrol models
Left manifold
Models 463.249/250
Installation details of the left exhaust manifold on models 463.250 (M112)
1 - Left exhaust manifold; 2 - Fastening nuts; 3 - Bolts; 4 - Sealing gasket; 5 - Heat shield (upper section); 6 - Heat shield (lower section); 7 - Ignition coils; 9 - Exhaust system cross section bracket bolts; 10 - Lower section of the exhaust system; G3/3 - Left pre-catalytic lambda probe; G3/3x1 - Left pre-catalytic lambda probe wiring connector
Installation details of the left exhaust manifold on models 463.249 (M113)
1 - Left exhaust manifold; 2 - Fastening nuts; 3 - Bolts; 4 - Sealing gaskets; 5 - Heat shield (upper section); 6 - Heat shield (lower section); 7 - Ignition coils; 8 - Lower section of the exhaust system; 9 - Exhaust system cross section bracket bolts; G3/3 - Left pre-catalytic lambda probe; G3/3x1 - Left pre-catalytic lambda probe wiring connector
1. Disconnect the negative cable from the battery.
2. Remove the power unit cover with built-in air cleaner (see Section Removal and installation air intake tract components).
3. Remove the left ignition coils (see Chapter Engine electrical systems).
4. On models 463.250 (M112), in order to provide access to the bolts securing the cross section of the exhaust system, remove the left pre-catalytic lambda probe (G3/3) with the electrical wiring connected to it (G3/3x1).
5. Remove the upper section of the heat shield (5).
Note: The screen consists of two sections bolted together.
6. On models 463.249 (M113), disconnect the throttle cable from the controller.
7. Loosen the flange connection of the exhaust system cross section (10/8) to the left exhaust manifold (1).
8. Remove the bolts (9) securing the lower section of the exhaust system to the transmission housing.
9. Remove the lower section of the heat shield (6).
10. Loosen the nuts (2) and remove the left exhaust manifold (1), - prepare replacement nuts (2), sealing gaskets (4) and studs.
11. Installation is carried out in reverse order.
12. Finally, clear the memory of the on-board diagnostic system processor (see Chapter Engine electrical systems).
Models 463.246 (G55 AMG)
Installation details of the left exhaust manifold on models 463.246 (G55 AMG)
1 - Left exhaust manifold; 2 - Fastening nuts; 3 - Heat shield (upper section); 4 - Heat shield (lower section); 5 - Flange connection of the lower section of the exhaust system
1. Disconnect the negative cable from the battery.
2. Remove the power unit cover with the built-in air cleaner (see Section Removal and installation air intake tract components).
3. Remove the left pre-catalytic lambda probe with the electrical wiring connected to it.
4. Remove the upper section of the heat shield (3).
5. Disconnect the throttle cable from the controller.
6. Loosen the flange connection (5) securing the lower section of the exhaust system - replace the nuts if necessary.
7. Remove the lower section of the heat shield (4).
8. Loosen the eight mounting nuts (2) and remove the left exhaust manifold (1).
9. Installation is carried out in reverse order.
10. Finally, clear the memory of the on-board diagnostic system processor (see Chapter Engine electrical systems).
Right collector
Installation details of the right exhaust manifold on petrol models (using the M112 engine as an example)
1 - Right exhaust manifold; 2 - Fastening nuts; 3 - Sealing gaskets; 4 - Generator heat shield; 5 - Heat shield; 6 - Ignition coils; 7 - Bolts
1. Disconnect the negative cable from the battery.
2. Remove the air cleaner (see Section Removal and installation air intake tract components).
3. Remove the right ignition coils (see Chapter Engine electrical systems).
4. Remove the heat shield (5) installed under the manifold.
5. Remove the generator heat shield (4).
6. On models 463.250 (M112) separate the front section of the exhaust system from the exhaust manifold, - if necessary replace the nuts of the bolts (7).
7. On models 463.249/246 (M113), remove the flange connections on the left and right side of the front section of the exhaust system.
8. Loosen the fastening nuts (2) and, pushing upwards, remove the right exhaust manifold (1).
9. Installation is carried out in the reverse order. Do not forget to replace the nuts (2), sealing gaskets (3) and studs.
Diesel models
Models 463.323 (M612)
Exhaust manifold installation details for diesel models 463.323 (M612)
1 - Exhaust manifold; 2 - Sealing gasket; 3 - Hairpins; 4 - Self-locking nuts; 110 - Turbocharger; 120/1 - Primary catalytic converter
1. Remove the catalytic converter (see Section Removal and installation of the exhaust system).
2. Remove the turbocharger (see Section Servicing air intake tract components).
3. Remove the ATF dipstick guide tube bracket (do not remove the dipstick).
4. Loosen the self-locking nuts (4) and, moving the ATF dipstick guide tube to the side, remove the exhaust manifold (1) - the nuts must be replaced without fail.
5. Installation is carried out in reverse order.
Models 463.333 (M628)
Installation details of exhaust manifolds on diesel models 463.333 (M628)
1 - Left exhaust manifold; 2 - Sealing gaskets; 3 - Right exhaust manifold; 4 - Hairpins; 5 - Self-locking nuts
1. Remove the turbocharger (see Section Servicing air intake tract components).
2. Loosen the fastening nuts (5) and remove the exhaust manifolds (1 and 3) and their sealing gaskets (2) - the nuts must be replaced without fail.
3. Installation is carried out in the reverse order - check the condition of the mounting studs (4), replace damaged fasteners.